1 //===--- DebugInfo.cpp - Debug Information Helper Classes -----------------===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This file implements the helper classes used to build and interpret debug
11 // information in LLVM IR form.
13 //===----------------------------------------------------------------------===//
15 #include "llvm/IR/DebugInfo.h"
16 #include "LLVMContextImpl.h"
17 #include "llvm/ADT/STLExtras.h"
18 #include "llvm/ADT/SmallPtrSet.h"
19 #include "llvm/ADT/SmallString.h"
20 #include "llvm/Analysis/ValueTracking.h"
21 #include "llvm/IR/Constants.h"
22 #include "llvm/IR/DerivedTypes.h"
23 #include "llvm/IR/Instructions.h"
24 #include "llvm/IR/IntrinsicInst.h"
25 #include "llvm/IR/Intrinsics.h"
26 #include "llvm/IR/Module.h"
27 #include "llvm/IR/ValueHandle.h"
28 #include "llvm/Support/Debug.h"
29 #include "llvm/Support/Dwarf.h"
30 #include "llvm/Support/raw_ostream.h"
32 using namespace llvm::dwarf;
34 //===----------------------------------------------------------------------===//
36 //===----------------------------------------------------------------------===//
38 bool DIDescriptor::Verify() const {
40 (DIDerivedType(DbgNode).Verify() ||
41 DICompositeType(DbgNode).Verify() || DIBasicType(DbgNode).Verify() ||
42 DITrivialType(DbgNode).Verify() ||
43 DIVariable(DbgNode).Verify() || DISubprogram(DbgNode).Verify() ||
44 DIGlobalVariable(DbgNode).Verify() || DIFile(DbgNode).Verify() ||
45 DICompileUnit(DbgNode).Verify() || DINameSpace(DbgNode).Verify() ||
46 DILexicalBlock(DbgNode).Verify() ||
47 DILexicalBlockFile(DbgNode).Verify() ||
48 DISubrange(DbgNode).Verify() || DIEnumerator(DbgNode).Verify() ||
49 DIObjCProperty(DbgNode).Verify() ||
50 DITemplateTypeParameter(DbgNode).Verify() ||
51 DITemplateValueParameter(DbgNode).Verify() ||
52 DIImportedEntity(DbgNode).Verify());
55 static Value *getField(const MDNode *DbgNode, unsigned Elt) {
56 if (!DbgNode || Elt >= DbgNode->getNumOperands())
58 return DbgNode->getOperand(Elt);
61 static MDNode *getNodeField(const MDNode *DbgNode, unsigned Elt) {
62 return dyn_cast_or_null<MDNode>(getField(DbgNode, Elt));
65 static StringRef getStringField(const MDNode *DbgNode, unsigned Elt) {
66 if (MDString *MDS = dyn_cast_or_null<MDString>(getField(DbgNode, Elt)))
67 return MDS->getString();
71 StringRef DIDescriptor::getStringField(unsigned Elt) const {
72 return ::getStringField(DbgNode, Elt);
75 uint64_t DIDescriptor::getUInt64Field(unsigned Elt) const {
79 if (Elt < DbgNode->getNumOperands())
81 dyn_cast_or_null<ConstantInt>(DbgNode->getOperand(Elt)))
82 return CI->getZExtValue();
87 int64_t DIDescriptor::getInt64Field(unsigned Elt) const {
91 if (Elt < DbgNode->getNumOperands())
93 dyn_cast_or_null<ConstantInt>(DbgNode->getOperand(Elt)))
94 return CI->getSExtValue();
99 DIDescriptor DIDescriptor::getDescriptorField(unsigned Elt) const {
100 MDNode *Field = getNodeField(DbgNode, Elt);
101 return DIDescriptor(Field);
104 GlobalVariable *DIDescriptor::getGlobalVariableField(unsigned Elt) const {
108 if (Elt < DbgNode->getNumOperands())
109 return dyn_cast_or_null<GlobalVariable>(DbgNode->getOperand(Elt));
113 Constant *DIDescriptor::getConstantField(unsigned Elt) const {
117 if (Elt < DbgNode->getNumOperands())
118 return dyn_cast_or_null<Constant>(DbgNode->getOperand(Elt));
122 Function *DIDescriptor::getFunctionField(unsigned Elt) const {
126 if (Elt < DbgNode->getNumOperands())
127 return dyn_cast_or_null<Function>(DbgNode->getOperand(Elt));
131 void DIDescriptor::replaceFunctionField(unsigned Elt, Function *F) {
135 if (Elt < DbgNode->getNumOperands()) {
136 MDNode *Node = const_cast<MDNode *>(DbgNode);
137 Node->replaceOperandWith(Elt, F);
141 uint64_t DIVariable::getAddrElement(unsigned Idx) const {
142 DIDescriptor ComplexExpr = getDescriptorField(8);
143 if (Idx < ComplexExpr->getNumOperands())
144 if (auto *CI = dyn_cast_or_null<ConstantInt>(ComplexExpr->getOperand(Idx)))
145 return CI->getZExtValue();
147 assert(false && "non-existing complex address element requested");
151 /// getInlinedAt - If this variable is inlined then return inline location.
152 MDNode *DIVariable::getInlinedAt() const { return getNodeField(DbgNode, 7); }
154 //===----------------------------------------------------------------------===//
156 //===----------------------------------------------------------------------===//
158 bool DIDescriptor::isTrivialType() const {
159 return DbgNode && getTag() == dwarf::DW_TAG_unspecified_parameters;
162 bool DIDescriptor::isSubroutineType() const {
163 return isCompositeType() && getTag() == dwarf::DW_TAG_subroutine_type;
166 /// isBasicType - Return true if the specified tag is legal for
168 bool DIDescriptor::isBasicType() const {
172 case dwarf::DW_TAG_base_type:
173 case dwarf::DW_TAG_unspecified_type:
180 /// isDerivedType - Return true if the specified tag is legal for DIDerivedType.
181 bool DIDescriptor::isDerivedType() const {
185 case dwarf::DW_TAG_typedef:
186 case dwarf::DW_TAG_pointer_type:
187 case dwarf::DW_TAG_ptr_to_member_type:
188 case dwarf::DW_TAG_reference_type:
189 case dwarf::DW_TAG_rvalue_reference_type:
190 case dwarf::DW_TAG_const_type:
191 case dwarf::DW_TAG_volatile_type:
192 case dwarf::DW_TAG_restrict_type:
193 case dwarf::DW_TAG_member:
194 case dwarf::DW_TAG_inheritance:
195 case dwarf::DW_TAG_friend:
198 // CompositeTypes are currently modelled as DerivedTypes.
199 return isCompositeType();
203 /// isCompositeType - Return true if the specified tag is legal for
205 bool DIDescriptor::isCompositeType() const {
209 case dwarf::DW_TAG_array_type:
210 case dwarf::DW_TAG_structure_type:
211 case dwarf::DW_TAG_union_type:
212 case dwarf::DW_TAG_enumeration_type:
213 case dwarf::DW_TAG_subroutine_type:
214 case dwarf::DW_TAG_class_type:
221 /// isVariable - Return true if the specified tag is legal for DIVariable.
222 bool DIDescriptor::isVariable() const {
226 case dwarf::DW_TAG_auto_variable:
227 case dwarf::DW_TAG_arg_variable:
234 /// isType - Return true if the specified tag is legal for DIType.
235 bool DIDescriptor::isType() const {
236 return isBasicType() || isCompositeType() || isDerivedType() ||
240 /// isSubprogram - Return true if the specified tag is legal for
242 bool DIDescriptor::isSubprogram() const {
243 return DbgNode && getTag() == dwarf::DW_TAG_subprogram;
246 /// isGlobalVariable - Return true if the specified tag is legal for
247 /// DIGlobalVariable.
248 bool DIDescriptor::isGlobalVariable() const {
249 return DbgNode && (getTag() == dwarf::DW_TAG_variable ||
250 getTag() == dwarf::DW_TAG_constant);
253 /// isUnspecifiedParmeter - Return true if the specified tag is
254 /// DW_TAG_unspecified_parameters.
255 bool DIDescriptor::isUnspecifiedParameter() const {
256 return DbgNode && getTag() == dwarf::DW_TAG_unspecified_parameters;
259 /// isScope - Return true if the specified tag is one of the scope
261 bool DIDescriptor::isScope() const {
265 case dwarf::DW_TAG_compile_unit:
266 case dwarf::DW_TAG_lexical_block:
267 case dwarf::DW_TAG_subprogram:
268 case dwarf::DW_TAG_namespace:
269 case dwarf::DW_TAG_file_type:
277 /// isTemplateTypeParameter - Return true if the specified tag is
278 /// DW_TAG_template_type_parameter.
279 bool DIDescriptor::isTemplateTypeParameter() const {
280 return DbgNode && getTag() == dwarf::DW_TAG_template_type_parameter;
283 /// isTemplateValueParameter - Return true if the specified tag is
284 /// DW_TAG_template_value_parameter.
285 bool DIDescriptor::isTemplateValueParameter() const {
286 return DbgNode && (getTag() == dwarf::DW_TAG_template_value_parameter ||
287 getTag() == dwarf::DW_TAG_GNU_template_template_param ||
288 getTag() == dwarf::DW_TAG_GNU_template_parameter_pack);
291 /// isCompileUnit - Return true if the specified tag is DW_TAG_compile_unit.
292 bool DIDescriptor::isCompileUnit() const {
293 return DbgNode && getTag() == dwarf::DW_TAG_compile_unit;
296 /// isFile - Return true if the specified tag is DW_TAG_file_type.
297 bool DIDescriptor::isFile() const {
298 return DbgNode && getTag() == dwarf::DW_TAG_file_type;
301 /// isNameSpace - Return true if the specified tag is DW_TAG_namespace.
302 bool DIDescriptor::isNameSpace() const {
303 return DbgNode && getTag() == dwarf::DW_TAG_namespace;
306 /// isLexicalBlockFile - Return true if the specified descriptor is a
307 /// lexical block with an extra file.
308 bool DIDescriptor::isLexicalBlockFile() const {
309 return DbgNode && getTag() == dwarf::DW_TAG_lexical_block &&
310 (DbgNode->getNumOperands() == 3);
313 /// isLexicalBlock - Return true if the specified tag is DW_TAG_lexical_block.
314 bool DIDescriptor::isLexicalBlock() const {
315 return DbgNode && getTag() == dwarf::DW_TAG_lexical_block &&
316 (DbgNode->getNumOperands() > 3);
319 /// isSubrange - Return true if the specified tag is DW_TAG_subrange_type.
320 bool DIDescriptor::isSubrange() const {
321 return DbgNode && getTag() == dwarf::DW_TAG_subrange_type;
324 /// isEnumerator - Return true if the specified tag is DW_TAG_enumerator.
325 bool DIDescriptor::isEnumerator() const {
326 return DbgNode && getTag() == dwarf::DW_TAG_enumerator;
329 /// isObjCProperty - Return true if the specified tag is DW_TAG_APPLE_property.
330 bool DIDescriptor::isObjCProperty() const {
331 return DbgNode && getTag() == dwarf::DW_TAG_APPLE_property;
334 /// \brief Return true if the specified tag is DW_TAG_imported_module or
335 /// DW_TAG_imported_declaration.
336 bool DIDescriptor::isImportedEntity() const {
337 return DbgNode && (getTag() == dwarf::DW_TAG_imported_module ||
338 getTag() == dwarf::DW_TAG_imported_declaration);
341 //===----------------------------------------------------------------------===//
342 // Simple Descriptor Constructors and other Methods
343 //===----------------------------------------------------------------------===//
345 /// replaceAllUsesWith - Replace all uses of the MDNode used by this
346 /// type with the one in the passed descriptor.
347 void DIType::replaceAllUsesWith(LLVMContext &VMContext, DIDescriptor D) {
349 assert(DbgNode && "Trying to replace an unverified type!");
351 // Since we use a TrackingVH for the node, its easy for clients to manufacture
352 // legitimate situations where they want to replaceAllUsesWith() on something
353 // which, due to uniquing, has merged with the source. We shield clients from
354 // this detail by allowing a value to be replaced with replaceAllUsesWith()
356 const MDNode *DN = D;
358 SmallVector<Value*, 10> Ops(DbgNode->getNumOperands());
359 for (size_t i = 0; i != Ops.size(); ++i)
360 Ops[i] = DbgNode->getOperand(i);
361 DN = MDNode::get(VMContext, Ops);
364 MDNode *Node = const_cast<MDNode *>(DbgNode);
365 const Value *V = cast_or_null<Value>(DN);
366 Node->replaceAllUsesWith(const_cast<Value *>(V));
367 MDNode::deleteTemporary(Node);
371 /// replaceAllUsesWith - Replace all uses of the MDNode used by this
372 /// type with the one in D.
373 void DIType::replaceAllUsesWith(MDNode *D) {
375 assert(DbgNode && "Trying to replace an unverified type!");
376 assert(DbgNode != D && "This replacement should always happen");
377 MDNode *Node = const_cast<MDNode *>(DbgNode);
378 const MDNode *DN = D;
379 const Value *V = cast_or_null<Value>(DN);
380 Node->replaceAllUsesWith(const_cast<Value *>(V));
381 MDNode::deleteTemporary(Node);
384 /// Verify - Verify that a compile unit is well formed.
385 bool DICompileUnit::Verify() const {
386 if (!isCompileUnit())
389 // Don't bother verifying the compilation directory or producer string
390 // as those could be empty.
391 if (getFilename().empty())
394 return DbgNode->getNumOperands() == 14;
397 /// Verify - Verify that an ObjC property is well formed.
398 bool DIObjCProperty::Verify() const {
399 if (!isObjCProperty())
402 // Don't worry about the rest of the strings for now.
403 return DbgNode->getNumOperands() == 8;
406 /// Check if a field at position Elt of a MDNode is a MDNode.
407 /// We currently allow an empty string and an integer.
408 /// But we don't allow a non-empty string in a MDNode field.
409 static bool fieldIsMDNode(const MDNode *DbgNode, unsigned Elt) {
410 // FIXME: This function should return true, if the field is null or the field
411 // is indeed a MDNode: return !Fld || isa<MDNode>(Fld).
412 Value *Fld = getField(DbgNode, Elt);
413 if (Fld && isa<MDString>(Fld) && !cast<MDString>(Fld)->getString().empty())
418 /// Check if a field at position Elt of a MDNode is a MDString.
419 static bool fieldIsMDString(const MDNode *DbgNode, unsigned Elt) {
420 Value *Fld = getField(DbgNode, Elt);
421 return !Fld || isa<MDString>(Fld);
424 /// Check if a value can be a reference to a type.
425 static bool isTypeRef(const Value *Val) {
427 (isa<MDString>(Val) && !cast<MDString>(Val)->getString().empty()) ||
428 (isa<MDNode>(Val) && DIType(cast<MDNode>(Val)).isType());
431 /// Check if a field at position Elt of a MDNode can be a reference to a type.
432 static bool fieldIsTypeRef(const MDNode *DbgNode, unsigned Elt) {
433 Value *Fld = getField(DbgNode, Elt);
434 return isTypeRef(Fld);
437 /// Check if a value can be a ScopeRef.
438 static bool isScopeRef(const Value *Val) {
440 (isa<MDString>(Val) && !cast<MDString>(Val)->getString().empty()) ||
441 // Not checking for Val->isScope() here, because it would work
442 // only for lexical scopes and not all subclasses of DIScope.
446 /// Check if a field at position Elt of a MDNode can be a ScopeRef.
447 static bool fieldIsScopeRef(const MDNode *DbgNode, unsigned Elt) {
448 Value *Fld = getField(DbgNode, Elt);
449 return isScopeRef(Fld);
452 /// Verify - Verify that a type descriptor is well formed.
453 bool DIType::Verify() const {
456 // Make sure Context @ field 2 is MDNode.
457 if (!fieldIsScopeRef(DbgNode, 2))
460 // FIXME: Sink this into the various subclass verifies.
461 uint16_t Tag = getTag();
462 if (!isBasicType() && !isTrivialType() && Tag != dwarf::DW_TAG_const_type &&
463 Tag != dwarf::DW_TAG_volatile_type && Tag != dwarf::DW_TAG_pointer_type &&
464 Tag != dwarf::DW_TAG_ptr_to_member_type &&
465 Tag != dwarf::DW_TAG_reference_type &&
466 Tag != dwarf::DW_TAG_rvalue_reference_type &&
467 Tag != dwarf::DW_TAG_restrict_type && Tag != dwarf::DW_TAG_array_type &&
468 Tag != dwarf::DW_TAG_enumeration_type &&
469 Tag != dwarf::DW_TAG_subroutine_type &&
470 Tag != dwarf::DW_TAG_inheritance && Tag != dwarf::DW_TAG_friend &&
471 getFilename().empty())
473 // DIType is abstract, it should be a BasicType, a DerivedType or
476 return DIBasicType(DbgNode).Verify();
477 else if (isTrivialType())
478 return DITrivialType(DbgNode).Verify();
479 else if (isCompositeType())
480 return DICompositeType(DbgNode).Verify();
481 else if (isDerivedType())
482 return DIDerivedType(DbgNode).Verify();
487 /// Verify - Verify that a basic type descriptor is well formed.
488 bool DIBasicType::Verify() const {
489 return isBasicType() && DbgNode->getNumOperands() == 10;
492 bool DITrivialType::Verify() const {
493 return isTrivialType() && DbgNode->getNumOperands() == 1;
496 /// Verify - Verify that a derived type descriptor is well formed.
497 bool DIDerivedType::Verify() const {
498 // Make sure DerivedFrom @ field 9 is TypeRef.
499 if (!fieldIsTypeRef(DbgNode, 9))
501 if (getTag() == dwarf::DW_TAG_ptr_to_member_type)
502 // Make sure ClassType @ field 10 is a TypeRef.
503 if (!fieldIsTypeRef(DbgNode, 10))
506 return isDerivedType() && DbgNode->getNumOperands() >= 10 &&
507 DbgNode->getNumOperands() <= 14;
510 /// Verify - Verify that a composite type descriptor is well formed.
511 bool DICompositeType::Verify() const {
512 if (!isCompositeType())
515 // Make sure DerivedFrom @ field 9 and ContainingType @ field 12 are TypeRef.
516 if (!fieldIsTypeRef(DbgNode, 9))
518 if (!fieldIsTypeRef(DbgNode, 12))
521 // Make sure the type identifier at field 14 is MDString, it can be null.
522 if (!fieldIsMDString(DbgNode, 14))
525 // A subroutine type can't be both & and &&.
526 if (isLValueReference() && isRValueReference())
529 return DbgNode->getNumOperands() == 15;
532 /// Verify - Verify that a subprogram descriptor is well formed.
533 bool DISubprogram::Verify() const {
537 // Make sure context @ field 2 is a ScopeRef and type @ field 7 is a MDNode.
538 if (!fieldIsScopeRef(DbgNode, 2))
540 if (!fieldIsMDNode(DbgNode, 7))
542 // Containing type @ field 12.
543 if (!fieldIsTypeRef(DbgNode, 12))
546 // A subprogram can't be both & and &&.
547 if (isLValueReference() && isRValueReference())
550 return DbgNode->getNumOperands() == 20;
553 /// Verify - Verify that a global variable descriptor is well formed.
554 bool DIGlobalVariable::Verify() const {
555 if (!isGlobalVariable())
558 if (getDisplayName().empty())
560 // Make sure context @ field 2 is an MDNode.
561 if (!fieldIsMDNode(DbgNode, 2))
563 // Make sure that type @ field 8 is a DITypeRef.
564 if (!fieldIsTypeRef(DbgNode, 8))
566 // Make sure StaticDataMemberDeclaration @ field 12 is MDNode.
567 if (!fieldIsMDNode(DbgNode, 12))
570 return DbgNode->getNumOperands() == 13;
573 /// Verify - Verify that a variable descriptor is well formed.
574 bool DIVariable::Verify() const {
578 // Make sure context @ field 1 is an MDNode.
579 if (!fieldIsMDNode(DbgNode, 1))
581 // Make sure that type @ field 5 is a DITypeRef.
582 if (!fieldIsTypeRef(DbgNode, 5))
585 // Variable without a complex expression.
586 if (DbgNode->getNumOperands() == 8)
589 // Make sure the complex expression is an MDNode.
590 return (DbgNode->getNumOperands() == 9 && fieldIsMDNode(DbgNode, 8));
593 /// Verify - Verify that a location descriptor is well formed.
594 bool DILocation::Verify() const {
598 return DbgNode->getNumOperands() == 4;
601 /// Verify - Verify that a namespace descriptor is well formed.
602 bool DINameSpace::Verify() const {
605 return DbgNode->getNumOperands() == 5;
608 /// \brief Retrieve the MDNode for the directory/file pair.
609 MDNode *DIFile::getFileNode() const { return getNodeField(DbgNode, 1); }
611 /// \brief Verify that the file descriptor is well formed.
612 bool DIFile::Verify() const {
613 return isFile() && DbgNode->getNumOperands() == 2;
616 /// \brief Verify that the enumerator descriptor is well formed.
617 bool DIEnumerator::Verify() const {
618 return isEnumerator() && DbgNode->getNumOperands() == 3;
621 /// \brief Verify that the subrange descriptor is well formed.
622 bool DISubrange::Verify() const {
623 return isSubrange() && DbgNode->getNumOperands() == 3;
626 /// \brief Verify that the lexical block descriptor is well formed.
627 bool DILexicalBlock::Verify() const {
628 return isLexicalBlock() && DbgNode->getNumOperands() == 7;
631 /// \brief Verify that the file-scoped lexical block descriptor is well formed.
632 bool DILexicalBlockFile::Verify() const {
633 return isLexicalBlockFile() && DbgNode->getNumOperands() == 3;
636 /// \brief Verify that the template type parameter descriptor is well formed.
637 bool DITemplateTypeParameter::Verify() const {
638 return isTemplateTypeParameter() && DbgNode->getNumOperands() == 7;
641 /// \brief Verify that the template value parameter descriptor is well formed.
642 bool DITemplateValueParameter::Verify() const {
643 return isTemplateValueParameter() && DbgNode->getNumOperands() == 8;
646 /// \brief Verify that the imported module descriptor is well formed.
647 bool DIImportedEntity::Verify() const {
648 return isImportedEntity() &&
649 (DbgNode->getNumOperands() == 4 || DbgNode->getNumOperands() == 5);
652 /// getObjCProperty - Return property node, if this ivar is associated with one.
653 MDNode *DIDerivedType::getObjCProperty() const {
654 return getNodeField(DbgNode, 10);
657 MDString *DICompositeType::getIdentifier() const {
658 return cast_or_null<MDString>(getField(DbgNode, 14));
662 static void VerifySubsetOf(const MDNode *LHS, const MDNode *RHS) {
663 for (unsigned i = 0; i != LHS->getNumOperands(); ++i) {
664 // Skip the 'empty' list (that's a single i32 0, rather than truly empty).
665 if (i == 0 && isa<ConstantInt>(LHS->getOperand(i)))
667 const MDNode *E = cast<MDNode>(LHS->getOperand(i));
669 for (unsigned j = 0; !found && j != RHS->getNumOperands(); ++j)
670 found = E == RHS->getOperand(j);
671 assert(found && "Losing a member during member list replacement");
676 /// \brief Set the array of member DITypes.
677 void DICompositeType::setArraysHelper(MDNode *Elements, MDNode *TParams) {
678 TrackingVH<MDNode> N(*this);
681 // Check that the new list of members contains all the old members as well.
682 if (const MDNode *El = cast_or_null<MDNode>(N->getOperand(10)))
683 VerifySubsetOf(El, Elements);
685 N->replaceOperandWith(10, Elements);
688 N->replaceOperandWith(13, TParams);
692 /// Generate a reference to this DIType. Uses the type identifier instead
693 /// of the actual MDNode if possible, to help type uniquing.
694 DIScopeRef DIScope::getRef() const {
695 if (!isCompositeType())
696 return DIScopeRef(*this);
697 DICompositeType DTy(DbgNode);
698 if (!DTy.getIdentifier())
699 return DIScopeRef(*this);
700 return DIScopeRef(DTy.getIdentifier());
703 /// \brief Set the containing type.
704 void DICompositeType::setContainingType(DICompositeType ContainingType) {
705 TrackingVH<MDNode> N(*this);
706 N->replaceOperandWith(12, ContainingType.getRef());
710 /// isInlinedFnArgument - Return true if this variable provides debugging
711 /// information for an inlined function arguments.
712 bool DIVariable::isInlinedFnArgument(const Function *CurFn) {
713 assert(CurFn && "Invalid function");
714 if (!getContext().isSubprogram())
716 // This variable is not inlined function argument if its scope
717 // does not describe current function.
718 return !DISubprogram(getContext()).describes(CurFn);
721 /// describes - Return true if this subprogram provides debugging
722 /// information for the function F.
723 bool DISubprogram::describes(const Function *F) {
724 assert(F && "Invalid function");
725 if (F == getFunction())
727 StringRef Name = getLinkageName();
730 if (F->getName() == Name)
735 unsigned DISubprogram::isOptimized() const {
736 assert(DbgNode && "Invalid subprogram descriptor!");
737 if (DbgNode->getNumOperands() == 15)
738 return getUnsignedField(14);
742 MDNode *DISubprogram::getVariablesNodes() const {
743 return getNodeField(DbgNode, 18);
746 DIArray DISubprogram::getVariables() const {
747 return DIArray(getNodeField(DbgNode, 18));
750 Value *DITemplateValueParameter::getValue() const {
751 return getField(DbgNode, 4);
754 // If the current node has a parent scope then return that,
755 // else return an empty scope.
756 DIScopeRef DIScope::getContext() const {
759 return DIType(DbgNode).getContext();
762 return DIScopeRef(DISubprogram(DbgNode).getContext());
764 if (isLexicalBlock())
765 return DIScopeRef(DILexicalBlock(DbgNode).getContext());
767 if (isLexicalBlockFile())
768 return DIScopeRef(DILexicalBlockFile(DbgNode).getContext());
771 return DIScopeRef(DINameSpace(DbgNode).getContext());
773 assert((isFile() || isCompileUnit()) && "Unhandled type of scope.");
774 return DIScopeRef(nullptr);
777 // If the scope node has a name, return that, else return an empty string.
778 StringRef DIScope::getName() const {
780 return DIType(DbgNode).getName();
782 return DISubprogram(DbgNode).getName();
784 return DINameSpace(DbgNode).getName();
785 assert((isLexicalBlock() || isLexicalBlockFile() || isFile() ||
787 "Unhandled type of scope.");
791 StringRef DIScope::getFilename() const {
794 return ::getStringField(getNodeField(DbgNode, 1), 0);
797 StringRef DIScope::getDirectory() const {
800 return ::getStringField(getNodeField(DbgNode, 1), 1);
803 DIArray DICompileUnit::getEnumTypes() const {
804 if (!DbgNode || DbgNode->getNumOperands() < 13)
807 return DIArray(getNodeField(DbgNode, 7));
810 DIArray DICompileUnit::getRetainedTypes() const {
811 if (!DbgNode || DbgNode->getNumOperands() < 13)
814 return DIArray(getNodeField(DbgNode, 8));
817 DIArray DICompileUnit::getSubprograms() const {
818 if (!DbgNode || DbgNode->getNumOperands() < 13)
821 return DIArray(getNodeField(DbgNode, 9));
824 DIArray DICompileUnit::getGlobalVariables() const {
825 if (!DbgNode || DbgNode->getNumOperands() < 13)
828 return DIArray(getNodeField(DbgNode, 10));
831 DIArray DICompileUnit::getImportedEntities() const {
832 if (!DbgNode || DbgNode->getNumOperands() < 13)
835 return DIArray(getNodeField(DbgNode, 11));
838 /// copyWithNewScope - Return a copy of this location, replacing the
839 /// current scope with the given one.
840 DILocation DILocation::copyWithNewScope(LLVMContext &Ctx,
841 DILexicalBlock NewScope) {
842 SmallVector<Value *, 10> Elts;
844 for (unsigned I = 0; I < DbgNode->getNumOperands(); ++I) {
846 Elts.push_back(DbgNode->getOperand(I));
848 Elts.push_back(NewScope);
850 MDNode *NewDIL = MDNode::get(Ctx, Elts);
851 return DILocation(NewDIL);
854 /// computeNewDiscriminator - Generate a new discriminator value for this
855 /// file and line location.
856 unsigned DILocation::computeNewDiscriminator(LLVMContext &Ctx) {
857 std::pair<const char *, unsigned> Key(getFilename().data(), getLineNumber());
858 return ++Ctx.pImpl->DiscriminatorTable[Key];
861 /// fixupSubprogramName - Replace contains special characters used
862 /// in a typical Objective-C names with '.' in a given string.
863 static void fixupSubprogramName(DISubprogram Fn, SmallVectorImpl<char> &Out) {
865 Fn.getFunction() ? Fn.getFunction()->getName() : Fn.getName();
866 FName = Function::getRealLinkageName(FName);
868 StringRef Prefix("llvm.dbg.lv.");
869 Out.reserve(FName.size() + Prefix.size());
870 Out.append(Prefix.begin(), Prefix.end());
872 bool isObjCLike = false;
873 for (size_t i = 0, e = FName.size(); i < e; ++i) {
878 if (isObjCLike && (C == '[' || C == ']' || C == ' ' || C == ':' ||
879 C == '+' || C == '(' || C == ')'))
886 /// getFnSpecificMDNode - Return a NameMDNode, if available, that is
887 /// suitable to hold function specific information.
888 NamedMDNode *llvm::getFnSpecificMDNode(const Module &M, DISubprogram Fn) {
889 SmallString<32> Name;
890 fixupSubprogramName(Fn, Name);
891 return M.getNamedMetadata(Name.str());
894 /// getOrInsertFnSpecificMDNode - Return a NameMDNode that is suitable
895 /// to hold function specific information.
896 NamedMDNode *llvm::getOrInsertFnSpecificMDNode(Module &M, DISubprogram Fn) {
897 SmallString<32> Name;
898 fixupSubprogramName(Fn, Name);
899 return M.getOrInsertNamedMetadata(Name.str());
902 /// createInlinedVariable - Create a new inlined variable based on current
904 /// @param DV Current Variable.
905 /// @param InlinedScope Location at current variable is inlined.
906 DIVariable llvm::createInlinedVariable(MDNode *DV, MDNode *InlinedScope,
907 LLVMContext &VMContext) {
908 SmallVector<Value *, 16> Elts;
909 // Insert inlined scope as 7th element.
910 for (unsigned i = 0, e = DV->getNumOperands(); i != e; ++i)
911 i == 7 ? Elts.push_back(InlinedScope) : Elts.push_back(DV->getOperand(i));
912 return DIVariable(MDNode::get(VMContext, Elts));
915 /// cleanseInlinedVariable - Remove inlined scope from the variable.
916 DIVariable llvm::cleanseInlinedVariable(MDNode *DV, LLVMContext &VMContext) {
917 SmallVector<Value *, 16> Elts;
918 // Insert inlined scope as 7th element.
919 for (unsigned i = 0, e = DV->getNumOperands(); i != e; ++i)
920 i == 7 ? Elts.push_back(Constant::getNullValue(Type::getInt32Ty(VMContext)))
921 : Elts.push_back(DV->getOperand(i));
922 return DIVariable(MDNode::get(VMContext, Elts));
925 /// getDISubprogram - Find subprogram that is enclosing this scope.
926 DISubprogram llvm::getDISubprogram(const MDNode *Scope) {
927 DIDescriptor D(Scope);
928 if (D.isSubprogram())
929 return DISubprogram(Scope);
931 if (D.isLexicalBlockFile())
932 return getDISubprogram(DILexicalBlockFile(Scope).getContext());
934 if (D.isLexicalBlock())
935 return getDISubprogram(DILexicalBlock(Scope).getContext());
937 return DISubprogram();
940 /// getDICompositeType - Find underlying composite type.
941 DICompositeType llvm::getDICompositeType(DIType T) {
942 if (T.isCompositeType())
943 return DICompositeType(T);
945 if (T.isDerivedType()) {
946 // This function is currently used by dragonegg and dragonegg does
947 // not generate identifier for types, so using an empty map to resolve
948 // DerivedFrom should be fine.
949 DITypeIdentifierMap EmptyMap;
950 return getDICompositeType(
951 DIDerivedType(T).getTypeDerivedFrom().resolve(EmptyMap));
954 return DICompositeType();
957 /// Update DITypeIdentifierMap by going through retained types of each CU.
959 llvm::generateDITypeIdentifierMap(const NamedMDNode *CU_Nodes) {
960 DITypeIdentifierMap Map;
961 for (unsigned CUi = 0, CUe = CU_Nodes->getNumOperands(); CUi != CUe; ++CUi) {
962 DICompileUnit CU(CU_Nodes->getOperand(CUi));
963 DIArray Retain = CU.getRetainedTypes();
964 for (unsigned Ti = 0, Te = Retain.getNumElements(); Ti != Te; ++Ti) {
965 if (!Retain.getElement(Ti).isCompositeType())
967 DICompositeType Ty(Retain.getElement(Ti));
968 if (MDString *TypeId = Ty.getIdentifier()) {
969 // Definition has priority over declaration.
970 // Try to insert (TypeId, Ty) to Map.
971 std::pair<DITypeIdentifierMap::iterator, bool> P =
972 Map.insert(std::make_pair(TypeId, Ty));
973 // If TypeId already exists in Map and this is a definition, replace
974 // whatever we had (declaration or definition) with the definition.
975 if (!P.second && !Ty.isForwardDecl())
976 P.first->second = Ty;
983 //===----------------------------------------------------------------------===//
984 // DebugInfoFinder implementations.
985 //===----------------------------------------------------------------------===//
987 void DebugInfoFinder::reset() {
994 TypeIdentifierMap.clear();
995 TypeMapInitialized = false;
998 void DebugInfoFinder::InitializeTypeMap(const Module &M) {
999 if (!TypeMapInitialized)
1000 if (NamedMDNode *CU_Nodes = M.getNamedMetadata("llvm.dbg.cu")) {
1001 TypeIdentifierMap = generateDITypeIdentifierMap(CU_Nodes);
1002 TypeMapInitialized = true;
1006 /// processModule - Process entire module and collect debug info.
1007 void DebugInfoFinder::processModule(const Module &M) {
1008 InitializeTypeMap(M);
1009 if (NamedMDNode *CU_Nodes = M.getNamedMetadata("llvm.dbg.cu")) {
1010 for (unsigned i = 0, e = CU_Nodes->getNumOperands(); i != e; ++i) {
1011 DICompileUnit CU(CU_Nodes->getOperand(i));
1013 DIArray GVs = CU.getGlobalVariables();
1014 for (unsigned i = 0, e = GVs.getNumElements(); i != e; ++i) {
1015 DIGlobalVariable DIG(GVs.getElement(i));
1016 if (addGlobalVariable(DIG)) {
1017 processScope(DIG.getContext());
1018 processType(DIG.getType().resolve(TypeIdentifierMap));
1021 DIArray SPs = CU.getSubprograms();
1022 for (unsigned i = 0, e = SPs.getNumElements(); i != e; ++i)
1023 processSubprogram(DISubprogram(SPs.getElement(i)));
1024 DIArray EnumTypes = CU.getEnumTypes();
1025 for (unsigned i = 0, e = EnumTypes.getNumElements(); i != e; ++i)
1026 processType(DIType(EnumTypes.getElement(i)));
1027 DIArray RetainedTypes = CU.getRetainedTypes();
1028 for (unsigned i = 0, e = RetainedTypes.getNumElements(); i != e; ++i)
1029 processType(DIType(RetainedTypes.getElement(i)));
1030 DIArray Imports = CU.getImportedEntities();
1031 for (unsigned i = 0, e = Imports.getNumElements(); i != e; ++i) {
1032 DIImportedEntity Import = DIImportedEntity(Imports.getElement(i));
1033 DIDescriptor Entity = Import.getEntity().resolve(TypeIdentifierMap);
1034 if (Entity.isType())
1035 processType(DIType(Entity));
1036 else if (Entity.isSubprogram())
1037 processSubprogram(DISubprogram(Entity));
1038 else if (Entity.isNameSpace())
1039 processScope(DINameSpace(Entity).getContext());
1045 /// processLocation - Process DILocation.
1046 void DebugInfoFinder::processLocation(const Module &M, DILocation Loc) {
1049 InitializeTypeMap(M);
1050 processScope(Loc.getScope());
1051 processLocation(M, Loc.getOrigLocation());
1054 /// processType - Process DIType.
1055 void DebugInfoFinder::processType(DIType DT) {
1058 processScope(DT.getContext().resolve(TypeIdentifierMap));
1059 if (DT.isCompositeType()) {
1060 DICompositeType DCT(DT);
1061 processType(DCT.getTypeDerivedFrom().resolve(TypeIdentifierMap));
1062 if (DT.isSubroutineType()) {
1063 DITypeArray DTA = DISubroutineType(DT).getTypeArray();
1064 for (unsigned i = 0, e = DTA.getNumElements(); i != e; ++i)
1065 processType(DTA.getElement(i).resolve(TypeIdentifierMap));
1068 DIArray DA = DCT.getElements();
1069 for (unsigned i = 0, e = DA.getNumElements(); i != e; ++i) {
1070 DIDescriptor D = DA.getElement(i);
1072 processType(DIType(D));
1073 else if (D.isSubprogram())
1074 processSubprogram(DISubprogram(D));
1076 } else if (DT.isDerivedType()) {
1077 DIDerivedType DDT(DT);
1078 processType(DDT.getTypeDerivedFrom().resolve(TypeIdentifierMap));
1082 void DebugInfoFinder::processScope(DIScope Scope) {
1083 if (Scope.isType()) {
1088 if (Scope.isCompileUnit()) {
1089 addCompileUnit(DICompileUnit(Scope));
1092 if (Scope.isSubprogram()) {
1093 processSubprogram(DISubprogram(Scope));
1096 if (!addScope(Scope))
1098 if (Scope.isLexicalBlock()) {
1099 DILexicalBlock LB(Scope);
1100 processScope(LB.getContext());
1101 } else if (Scope.isLexicalBlockFile()) {
1102 DILexicalBlockFile LBF = DILexicalBlockFile(Scope);
1103 processScope(LBF.getScope());
1104 } else if (Scope.isNameSpace()) {
1105 DINameSpace NS(Scope);
1106 processScope(NS.getContext());
1110 /// processSubprogram - Process DISubprogram.
1111 void DebugInfoFinder::processSubprogram(DISubprogram SP) {
1112 if (!addSubprogram(SP))
1114 processScope(SP.getContext().resolve(TypeIdentifierMap));
1115 processType(SP.getType());
1116 DIArray TParams = SP.getTemplateParams();
1117 for (unsigned I = 0, E = TParams.getNumElements(); I != E; ++I) {
1118 DIDescriptor Element = TParams.getElement(I);
1119 if (Element.isTemplateTypeParameter()) {
1120 DITemplateTypeParameter TType(Element);
1121 processScope(TType.getContext().resolve(TypeIdentifierMap));
1122 processType(TType.getType().resolve(TypeIdentifierMap));
1123 } else if (Element.isTemplateValueParameter()) {
1124 DITemplateValueParameter TVal(Element);
1125 processScope(TVal.getContext().resolve(TypeIdentifierMap));
1126 processType(TVal.getType().resolve(TypeIdentifierMap));
1131 /// processDeclare - Process DbgDeclareInst.
1132 void DebugInfoFinder::processDeclare(const Module &M,
1133 const DbgDeclareInst *DDI) {
1134 MDNode *N = dyn_cast<MDNode>(DDI->getVariable());
1137 InitializeTypeMap(M);
1140 if (!DV.isVariable())
1143 if (!NodesSeen.insert(DV))
1145 processScope(DIVariable(N).getContext());
1146 processType(DIVariable(N).getType().resolve(TypeIdentifierMap));
1149 void DebugInfoFinder::processValue(const Module &M, const DbgValueInst *DVI) {
1150 MDNode *N = dyn_cast<MDNode>(DVI->getVariable());
1153 InitializeTypeMap(M);
1156 if (!DV.isVariable())
1159 if (!NodesSeen.insert(DV))
1161 processScope(DIVariable(N).getContext());
1162 processType(DIVariable(N).getType().resolve(TypeIdentifierMap));
1165 /// addType - Add type into Tys.
1166 bool DebugInfoFinder::addType(DIType DT) {
1170 if (!NodesSeen.insert(DT))
1177 /// addCompileUnit - Add compile unit into CUs.
1178 bool DebugInfoFinder::addCompileUnit(DICompileUnit CU) {
1181 if (!NodesSeen.insert(CU))
1188 /// addGlobalVariable - Add global variable into GVs.
1189 bool DebugInfoFinder::addGlobalVariable(DIGlobalVariable DIG) {
1193 if (!NodesSeen.insert(DIG))
1200 // addSubprogram - Add subprgoram into SPs.
1201 bool DebugInfoFinder::addSubprogram(DISubprogram SP) {
1205 if (!NodesSeen.insert(SP))
1212 bool DebugInfoFinder::addScope(DIScope Scope) {
1215 // FIXME: Ocaml binding generates a scope with no content, we treat it
1217 if (Scope->getNumOperands() == 0)
1219 if (!NodesSeen.insert(Scope))
1221 Scopes.push_back(Scope);
1225 //===----------------------------------------------------------------------===//
1226 // DIDescriptor: dump routines for all descriptors.
1227 //===----------------------------------------------------------------------===//
1229 /// dump - Print descriptor to dbgs() with a newline.
1230 void DIDescriptor::dump() const {
1235 /// print - Print descriptor.
1236 void DIDescriptor::print(raw_ostream &OS) const {
1240 if (const char *Tag = dwarf::TagString(getTag()))
1241 OS << "[ " << Tag << " ]";
1243 if (this->isSubrange()) {
1244 DISubrange(DbgNode).printInternal(OS);
1245 } else if (this->isCompileUnit()) {
1246 DICompileUnit(DbgNode).printInternal(OS);
1247 } else if (this->isFile()) {
1248 DIFile(DbgNode).printInternal(OS);
1249 } else if (this->isEnumerator()) {
1250 DIEnumerator(DbgNode).printInternal(OS);
1251 } else if (this->isBasicType()) {
1252 DIType(DbgNode).printInternal(OS);
1253 } else if (this->isDerivedType()) {
1254 DIDerivedType(DbgNode).printInternal(OS);
1255 } else if (this->isCompositeType()) {
1256 DICompositeType(DbgNode).printInternal(OS);
1257 } else if (this->isSubprogram()) {
1258 DISubprogram(DbgNode).printInternal(OS);
1259 } else if (this->isGlobalVariable()) {
1260 DIGlobalVariable(DbgNode).printInternal(OS);
1261 } else if (this->isVariable()) {
1262 DIVariable(DbgNode).printInternal(OS);
1263 } else if (this->isObjCProperty()) {
1264 DIObjCProperty(DbgNode).printInternal(OS);
1265 } else if (this->isNameSpace()) {
1266 DINameSpace(DbgNode).printInternal(OS);
1267 } else if (this->isScope()) {
1268 DIScope(DbgNode).printInternal(OS);
1272 void DISubrange::printInternal(raw_ostream &OS) const {
1273 int64_t Count = getCount();
1275 OS << " [" << getLo() << ", " << Count - 1 << ']';
1277 OS << " [unbounded]";
1280 void DIScope::printInternal(raw_ostream &OS) const {
1281 OS << " [" << getDirectory() << "/" << getFilename() << ']';
1284 void DICompileUnit::printInternal(raw_ostream &OS) const {
1285 DIScope::printInternal(OS);
1287 unsigned Lang = getLanguage();
1288 if (const char *LangStr = dwarf::LanguageString(Lang))
1291 (OS << "lang 0x").write_hex(Lang);
1295 void DIEnumerator::printInternal(raw_ostream &OS) const {
1296 OS << " [" << getName() << " :: " << getEnumValue() << ']';
1299 void DIType::printInternal(raw_ostream &OS) const {
1300 if (!DbgNode || isTrivialType())
1303 StringRef Res = getName();
1305 OS << " [" << Res << "]";
1307 // TODO: Print context?
1309 OS << " [line " << getLineNumber() << ", size " << getSizeInBits()
1310 << ", align " << getAlignInBits() << ", offset " << getOffsetInBits();
1312 if (const char *Enc =
1313 dwarf::AttributeEncodingString(DIBasicType(DbgNode).getEncoding()))
1314 OS << ", enc " << Enc;
1319 else if (isProtected())
1320 OS << " [protected]";
1323 OS << " [artificial]";
1325 if (isForwardDecl())
1327 else if (getTag() == dwarf::DW_TAG_structure_type ||
1328 getTag() == dwarf::DW_TAG_union_type ||
1329 getTag() == dwarf::DW_TAG_enumeration_type ||
1330 getTag() == dwarf::DW_TAG_class_type)
1334 if (isStaticMember())
1337 if (isLValueReference())
1338 OS << " [reference]";
1340 if (isRValueReference())
1341 OS << " [rvalue reference]";
1344 void DIDerivedType::printInternal(raw_ostream &OS) const {
1345 DIType::printInternal(OS);
1346 OS << " [from " << getTypeDerivedFrom().getName() << ']';
1349 void DICompositeType::printInternal(raw_ostream &OS) const {
1350 DIType::printInternal(OS);
1351 DIArray A = getElements();
1352 OS << " [" << A.getNumElements() << " elements]";
1355 void DINameSpace::printInternal(raw_ostream &OS) const {
1356 StringRef Name = getName();
1358 OS << " [" << Name << ']';
1360 OS << " [line " << getLineNumber() << ']';
1363 void DISubprogram::printInternal(raw_ostream &OS) const {
1364 // TODO : Print context
1365 OS << " [line " << getLineNumber() << ']';
1367 if (isLocalToUnit())
1373 if (getScopeLineNumber() != getLineNumber())
1374 OS << " [scope " << getScopeLineNumber() << "]";
1378 else if (isProtected())
1379 OS << " [protected]";
1381 if (isLValueReference())
1382 OS << " [reference]";
1384 if (isRValueReference())
1385 OS << " [rvalue reference]";
1387 StringRef Res = getName();
1389 OS << " [" << Res << ']';
1392 void DIGlobalVariable::printInternal(raw_ostream &OS) const {
1393 StringRef Res = getName();
1395 OS << " [" << Res << ']';
1397 OS << " [line " << getLineNumber() << ']';
1399 // TODO : Print context
1401 if (isLocalToUnit())
1408 void DIVariable::printInternal(raw_ostream &OS) const {
1409 StringRef Res = getName();
1411 OS << " [" << Res << ']';
1413 OS << " [line " << getLineNumber() << ']';
1416 void DIObjCProperty::printInternal(raw_ostream &OS) const {
1417 StringRef Name = getObjCPropertyName();
1419 OS << " [" << Name << ']';
1421 OS << " [line " << getLineNumber() << ", properties " << getUnsignedField(6)
1425 static void printDebugLoc(DebugLoc DL, raw_ostream &CommentOS,
1426 const LLVMContext &Ctx) {
1427 if (!DL.isUnknown()) { // Print source line info.
1428 DIScope Scope(DL.getScope(Ctx));
1429 assert(Scope.isScope() && "Scope of a DebugLoc should be a DIScope.");
1430 // Omit the directory, because it's likely to be long and uninteresting.
1431 CommentOS << Scope.getFilename();
1432 CommentOS << ':' << DL.getLine();
1433 if (DL.getCol() != 0)
1434 CommentOS << ':' << DL.getCol();
1435 DebugLoc InlinedAtDL = DebugLoc::getFromDILocation(DL.getInlinedAt(Ctx));
1436 if (!InlinedAtDL.isUnknown()) {
1437 CommentOS << " @[ ";
1438 printDebugLoc(InlinedAtDL, CommentOS, Ctx);
1444 void DIVariable::printExtendedName(raw_ostream &OS) const {
1445 const LLVMContext &Ctx = DbgNode->getContext();
1446 StringRef Res = getName();
1448 OS << Res << "," << getLineNumber();
1449 if (MDNode *InlinedAt = getInlinedAt()) {
1450 DebugLoc InlinedAtDL = DebugLoc::getFromDILocation(InlinedAt);
1451 if (!InlinedAtDL.isUnknown()) {
1453 printDebugLoc(InlinedAtDL, OS, Ctx);
1459 /// Specialize constructor to make sure it has the correct type.
1460 template <> DIRef<DIScope>::DIRef(const Value *V) : Val(V) {
1461 assert(isScopeRef(V) && "DIScopeRef should be a MDString or MDNode");
1463 template <> DIRef<DIType>::DIRef(const Value *V) : Val(V) {
1464 assert(isTypeRef(V) && "DITypeRef should be a MDString or MDNode");
1467 /// Specialize getFieldAs to handle fields that are references to DIScopes.
1469 DIScopeRef DIDescriptor::getFieldAs<DIScopeRef>(unsigned Elt) const {
1470 return DIScopeRef(getField(DbgNode, Elt));
1472 /// Specialize getFieldAs to handle fields that are references to DITypes.
1473 template <> DITypeRef DIDescriptor::getFieldAs<DITypeRef>(unsigned Elt) const {
1474 return DITypeRef(getField(DbgNode, Elt));
1477 /// Strip debug info in the module if it exists.
1478 /// To do this, we remove all calls to the debugger intrinsics and any named
1479 /// metadata for debugging. We also remove debug locations for instructions.
1480 /// Return true if module is modified.
1481 bool llvm::StripDebugInfo(Module &M) {
1483 bool Changed = false;
1485 // Remove all of the calls to the debugger intrinsics, and remove them from
1487 if (Function *Declare = M.getFunction("llvm.dbg.declare")) {
1488 while (!Declare->use_empty()) {
1489 CallInst *CI = cast<CallInst>(Declare->user_back());
1490 CI->eraseFromParent();
1492 Declare->eraseFromParent();
1496 if (Function *DbgVal = M.getFunction("llvm.dbg.value")) {
1497 while (!DbgVal->use_empty()) {
1498 CallInst *CI = cast<CallInst>(DbgVal->user_back());
1499 CI->eraseFromParent();
1501 DbgVal->eraseFromParent();
1505 for (Module::named_metadata_iterator NMI = M.named_metadata_begin(),
1506 NME = M.named_metadata_end(); NMI != NME;) {
1507 NamedMDNode *NMD = NMI;
1509 if (NMD->getName().startswith("llvm.dbg.")) {
1510 NMD->eraseFromParent();
1515 for (Module::iterator MI = M.begin(), ME = M.end(); MI != ME; ++MI)
1516 for (Function::iterator FI = MI->begin(), FE = MI->end(); FI != FE;
1518 for (BasicBlock::iterator BI = FI->begin(), BE = FI->end(); BI != BE;
1520 if (!BI->getDebugLoc().isUnknown()) {
1522 BI->setDebugLoc(DebugLoc());
1529 /// Return Debug Info Metadata Version by checking module flags.
1530 unsigned llvm::getDebugMetadataVersionFromModule(const Module &M) {
1531 Value *Val = M.getModuleFlag("Debug Info Version");
1534 return cast<ConstantInt>(Val)->getZExtValue();
1537 llvm::DenseMap<const llvm::Function *, llvm::DISubprogram>
1538 llvm::makeSubprogramMap(const Module &M) {
1539 DenseMap<const Function *, DISubprogram> R;
1541 NamedMDNode *CU_Nodes = M.getNamedMetadata("llvm.dbg.cu");
1545 for (MDNode *N : CU_Nodes->operands()) {
1546 DICompileUnit CUNode(N);
1547 DIArray SPs = CUNode.getSubprograms();
1548 for (unsigned i = 0, e = SPs.getNumElements(); i != e; ++i) {
1549 DISubprogram SP(SPs.getElement(i));
1550 if (Function *F = SP.getFunction())
1551 R.insert(std::make_pair(F, SP));